[sdiy] Odp: Re: breadboard woes

[Roman]

If it's square wave, DC meter will read half of amplitude, as it's just average value.  This is also RMS value so if your meter shows less in AC range, it's probably a model measuring average value and adjusting it for sine crest factor.  And if you see the same value before and after the filter, it may be because corner frequency of that filter is higher than input frequency.  BTW, checking how that circuit works would be way better with a speaker than voltmeter. Or at least oscilloscope. You're after interesting sonic values and not numbers on DVM, right? Build a filter that sounds good to you and then recalculate its values for all 96 frequencies.   Roman  Dnia 4 kwietnia 2017 21:34 Elain Klopke <functionofform at gmail.com> napisał(a):  I'm measuring in DC.   Measuring in AC gives me 2.03 volts at the source pin, before and after all the resistors.   connecting the resistor to the positive supply and measuring in DC gives me a reading of 5.06 V as if it was a plain bit of wire.   this is baffling because I checked the resistor with the resistance function again and it measures fine.... I even switched to the Hz function and measured the output square waves from the chip and got the expected frequencies.   On Tue, Apr 4, 2017 at 2:00 PM, Byron G. Jacquot  <   thescum at surfree.com >  wrote:  Are you measuring AC or DC volts?   2.4VDC might be an OK reading for a 5VAC square wave, depending on how your meter integrates it.    -----Original Message-----   From: Elain Klopke     Sent: Apr 4, 2017 12:43 PM   To: *SYNTH DIY     Subject: [sdiy] breadboard woes    So I was trying to get a reading on my breadboard to see how much voltage was lost between the input of three passive low pass filters in series and the output.    My measurements between ground and:  positive supply: 5.06 V  Output from chip: 2.4 V (was expecting 5 V because digital square wave)  junction of first and second resistor: 2.4 V  junction between second and third resistor: 2.4 V  after third resistor: 2.4 V ....   All resistors measured at 5.07 kOhms. I'm not sure what's going on. Is my breadboard messed up somehow or am I missing something fundamental about electronics?    ______________________________ _________________   Synth-diy mailing list      Synth-diy at synth-diy.org    synth-diy.org synth-diy.org listinfo/synth-diy     ______________________________  Synth-diy mailing list   Synth-diy at synth-diy.org  synth-diy.org synth-diy.org
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